1808560 has 80 divisors (see below), whose sum is σ = 4749696. Its totient is φ = 635904.

The previous prime is 1808557. The next prime is 1808561. The reversal of 1808560 is 658081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38457 + ... + 38503.

2^1808560 is an apocalyptic number.

1808560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1808560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2374848).

1808560 is an abundant number, since it is smaller than the sum of its proper divisors (2941136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1808560 is a wasteful number, since it uses less digits than its factorization.

1808560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1808560 is about 1344.8271264367. The cubic root of 1808560 is about 121.8365633778.

It can be divided in two parts, 18085 and 60, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 1808560 in words is "one million, eight hundred eight thousand, five hundred sixty".